GeForce 8800 GT 256MB vs Radeon R9 270X

Intro

Compare all that to the Radeon R9 270X, which features GPU core speed of 1000 MHz, and 2048 MB of GDDR5 RAM running at 1400 MHz through a 256-bit bus. It also is comprised of 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 256MB		105 Watts
Radeon R9 270X		180 Watts
	Difference: 75 Watts (71%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270X should be much faster than the GeForce 8800 GT 256MB in general. (explain)

Radeon R9 270X		179200 MB/sec
GeForce 8800 GT 256MB		44800 MB/sec
	Difference: 134400 (300%)

Texel Rate

The Radeon R9 270X should be much (more or less 138%) faster with regards to AF than the GeForce 8800 GT 256MB. (explain)

Radeon R9 270X		80000 Mtexels/sec
GeForce 8800 GT 256MB		33600 Mtexels/sec
	Difference: 46400 (138%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 270X is superior to the GeForce 8800 GT 256MB, and very much so. (explain)

Radeon R9 270X		32000 Mpixels/sec
GeForce 8800 GT 256MB		9600 Mpixels/sec
	Difference: 22400 (233%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.